NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors FEATURES Overload protection without risk of fire Wide range of overload currents (refer fusing characteristics graphs) Lead (Pb)-free solder contacts Pure tin plating provides compatibility with lead (Pb)-free A homogeneous film of metal alloy is deposited on a and lead containing soldering processes high grade ceramic body. After a helical groove has Compatible with Restriction of the use of Hazardous been cut in the resistive layer, tinned connecting wires Substances (RoHS) directive 2002/95/EC (issue 2004) of electrolytic copper are welded to the end-caps. The resistors are coated with a grey, flame retardant lacquer which provides electrical, mechanical, and climatic pro- APPLICATIONS tection. The encapsulation is resistant to all cleaning Audio solvents in accordance with MIL-STD-202E, method 215, Video and IEC 60068-2-45. TECHNICAL SPECIFICATIONS VALUE DESCRIPTION NFR25 NFR25H (1) Resistance range 0.22 to 15 k Resistance tolerance and series 5 % E24 series Maximum dissipation at T =70 C 0.33W 0.5W amb Thermal resistance R 240 K/W 150 K/W th Temperature coefficient: -6 -6 0.22 R 4.7 200 x 10 /K 200 x 10 /K -6 -6 4.7 < R 15 200 x 10 /K 100 x 10 /K -6 -6 15 < R 15 k 100 x 10 /K 100 x 10 /K Maximum permissible voltage (DC or RMS) 250 V 350 V Basic specifications IEC 60115-1 and 60115-2 Climatic category (IEC 60068) 55/155/56 Stability after: load R max.: (1 % R + 0.05 ) climatic tests R max.: (1 % R +0.05 ) soldering R max.: (0.25 % R +0.05 ) Notes: (1) Ohmic values (other than resistance range) are available on request R value is measured with probe distance of 24 1 mm using 4-terminal method 12NC INFORMATION Last Digit of 12NC Indicating Resistance Decade The resistors have a 12-digit numeric code starting with 23 RESISTANCE DECADE LAST DIGIT 0.22 to 0.91 7 The subsequent 7digits indicate the resistor type and 1to9.1 8 packaging 10 to 91 9 The remaining 3 digits indicate the resistance values: 100 to 910 1 1to9.1k 2 The first 2 digits indicate the resistance value 10 to 15 k 3 The last digit indicates the resistance decade 12NC Example The 12NC for a NFR25 resistor with value 750 , supplied on a bandolier of 1000units in ammopack is: 2322 205 13751. Document Number: 28737 For technical questions, contact: ff3dresistors vishay.com www.vishay.com Revision: 20-Sep-07 123NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 12NC - resistor type and packaging ORDERING CODE 23...... BANDOLIER BANDOLIER IN AMMOPACK ON REEL TYPE RADIAL TAPED STRAIGHT LEADS STRAIGHT LEADS 4000 1000 5000 5000 units units units units NFR25 06 204 03... 22 205 13... 22 205 33... 22 205 23... NFR25H 06 207 03... 22 207 13... 22 207 33... 22 207 23... PART NUMBER PART NUMBER: NFR2500002207JA100 N F R 25 0 00 0 2 2 0 7 J A 1 00 (1) MODEL/SIZE SPECIAL CHARACTER TCR/MATERIAL VALUE TOLERANCE PACKAGING SPECIAL NFR2500 0 = neutral 0 = standard 3 digit value J = 5 % N4 The 2 digits Z = value overflow 1 digit multiplier A5 are used for NFR25H0 (Special) Multiplier: A1 all special -3 R5 parts. 7 = *10 -2 00 = standard 8 = *10 -1 9 = *10 0 0 = *10 1 1 = *10 2 2 = *10 PRODUCT DESCRIPTION: NFR25 5 % A1 R22 NFR25 5 % A1 R22 (1) MODEL/SIZE TOLERANCE PACKAGING RESISTANCE VALUE NFR25 5 % N4 1K0 = 1 k NFR25H A5 4R7 = 4.7 A1 R5 Notes: (1) Please refer to table PACKAGING for details. The PART NUMBER is shown to facilitate the introduction of a unified part numbering system for ordering products. PACKAGING CODE PIECES DESCRIPTION MODEL/SIZE N4 4000 Bandolier in ammopack radial taped A5 5000 Bandolier in ammopack straight leads NFR25, NFR25H A1 Bandolier in ammopack straight leads 1000 R5 Bandolier on reel straight leads 5000 www.vishay.com For technical questions, contact: ff3dresistors vishay.com Document Number: 28737 124 Revision: 20-Sep-07